TRAPPED: Worker killed inside tank on work site

A man who has been trapped all morning in a tank at a western Sydney industrial site has died.

Emergency services had been working frantically since 8.45am to free the man when he went inside the tank in Auburn to clean it.

The victim is believed to be aged in his 30s. His body is still trapped in the tank.

It's believed was trapped "by compression" inside the tank, which is located in an ink and chemical manufacturing company.

Three men went inside and two were able to freed. Both rescued men were taken to Westmead Hospital with leg injuries.

Work Cover has been informed of the incident.

Emergency services are preparing for the rescue to take as long as three hours.

NSW Ambulance Superintendent Paul Turner told The Daily Telegraph: "We are working as quickly as we can to access these patients. This is a confined space and the difficulty has been getting to them as quickly as possible."

EARLIER: One man has been freed while another remains trapped inside an oil tank following a worksite accident at an ink manufacturing company in Sydney's west.

Crews are on-site at Chisolm Rd, Auburn trying to free the man who has been trapped since 8.35am.

A rescue attempt is underway for two men trapped in a tank at an ink factory.

It is understood the man is trapped "by compression" inside a tank at an oil ink and chemical manufacturing company. A second man was freed shortly after 11am while a third worker was extricated earlier and taken to Westmead Hospital with serious leg injuries.